Dathi
I don't know about the league becoming a monopoly for any state with maritime aspirations. More likely I would have thought that some counter block builds up, at least unless the League members play it cautiously to avoid being too dominant.
However that is a good example of the sort of thing I was thinking of, although the degree to which Canada is growing by ~1900 it could be less of a British than a Canadian empire. Mind you, you are terming it a Canada wank

Most examples I've thought of Canada isn't as overwhelming as I think its likely to be in TTL.
Steve